The antediluvian world from Plato's dialogues Timaeus and Critias. Was it a story made up as an example of a philosophical argument? Was it an exaggeration based on the ancient cities of Thera in the Mediterranean? Or was it real? Did an advanced civilization exist somewhere in the Atlantic Ocean around 9000 BC?

One of the most intriguing and frustrating puzzles of all time. The 200 year search for buried treasure on a booby-trapped island off the coast of Nova Scotia, Canada. Millions of dollars have been spent and six people killed, yet the treasure still eludes all seekers. What lies at the bottom of this mystery?

In the late 1800s there were reports of Canals on Mars. Now in the late 1900s we have reports of Faces and Pyramids on Mars. The canals have been discredited. Will the Faces and Pyramids be too? See the pictures and decide for yourself.

Sleeping Prophet or Psychic Lunatic? Is it possible for an untrained, uneducated man to make accurate medical readings of people he's never seen or met? Will his predications of natural disasters come true by the end of the 20th century? Have the re-incarnated souls of Atlantis returned?

Michel de Nostredame - Could he see the future? Is there truth in his prophecies or is there enough ambiguity that anyone who looks hard enough can, in hindsight, predict almost any major political or military action of the last 500 years?

This ancient monument stands silently on the Salisbury Plain in southern England. Who built it and why? Could it have served as an observatory, an ancient clock or calendar, used to track eclipses and the coming of the seasons?x

Sasquatch, Yeti. Mysterious man / ape beings have been reported around the world from the US / Canadian wilderness, to the slopes of the Himalayas, to the forests of Siberia. Are they mistakes, illusions, hoaxes, or real?

Nessie is rivaled perhaps only by Bigfoot for the top spot in the mysterious monsters category. Is it possible that a species of huge creatures could live so long right under the noses of people without any concrete evidence showing up?

Something crashed on the desert floor in Roswell, New Mexico in 1947 and was recovered by the military. The military's first report claimed the object to be a flying saucer. Soon after the story was changed - the object was a weather balloon. What really crashed? Is the government covering up something? Or has the whole episode simply been blown out of proportion?